Fuse-cap protector.



R.G.MILLER. FUSE GAP PROTECTOR.

uruouxon FILED we. 11, 1913.

Patehted Dec. 16, 1913.

lnv entor Witnesses s V. e n r. o

coLuMpm PLANOGRAPH co., WASHINGTON. D. c.

UN STATES PATENT RUDOLPH C. MILLER, OF RENO, NEVADA.

FUSE-CAP PROTECTOR.

To all whom it may concern:

Be it known that I, RUDOLPH C. MILLER, a'citizen of the United States, residing at Reno, in the county of Washoe and State of Nevada, have invented a new and useful Fuse-Cap Protector, of which the following is a specification.

The present invention appertains generally to fuse caps and relates particularly to a protector for fuse caps.

It is the object of the present invention to provide a novel and improved device, of simple and inexpensive construction, which may be conveniently and efficiently applied over a fuse cap, to render the fuse cap waterproof and to tightly secure the fuse cap over the fuse.

The invention has been illustrated in its preferred embodiment in the accompanying drawing, wherein Figure 1 is an elevation of the end of a fuse and fuse cap, with the improved protector applied thereto. Fig. 2 is a longitudinal section thereof, thefuse being shown in full. Fig. 3 is a perspective view of the protector prior to application to the fuse cap.

The present device is of such a nature, as to be applicable to any suitable blasting fuse 1, over the end of which the fuse cap 2 is slipped, fuse powder 3 being held within the head'of the cap and being brought against the end of the fuse when the cap is slipped over the fuse. The fuse cap 2 is usually of copper, brass, or a suitable alloy. 7

In carrying out the present invention, there is provided a sleeve or band 4 of lead or other soft metal, and of an internal diameter slightly larger than" the external diameter of the cap 2. It will be apparent that the sleeve or band 4 may be of any suitable size, according to the dimensions of the fuse cap with which the protector is employed.

After the fuse cap has been engaged over the end of the fuse, the sleeve or band 4 is slipped over the fuse cap, so that its intermediate portion stands over the rim or mouth of the fuse cap, in which event, the

sleeve or band is compressed bymeans of a pair of pinchers, pliers, or any other suitable implement, so that the sleeve or band very tightly embraces the open end portion or mouthof the cap and the adjoining exposed portion of the fuse. The sleeve or Specification of Letters Patent.

Application filed August 11, 1913.

Patented Dec. 16, 1913. Serial N 0. 784,243.

band in being contracted, will compress the mouth or open end portion of the fuse cap, in order that the crimped or contracted portion of the fuse cap, will tightly grip and compress the fuse to lock the fuse cap on the fuse. The ends of the sleeve or band may also be battered or worked against the fuse cap and fuse, to assist in looking the fuse cap upon the end of the fuse. When the sleeve or band has thus been applied to the fuse and its cap, there will be no liability of water, moisture, or other extraneous matter entering the fuse cap, which would be objectionable. Thus, the present device serves the double function of rendering the fuse cap water proof, and of locking the fuse cap over the end of the fuse.

The present device is extremely simple and inexpensive, and is readily and efficiently applicable over a fuse cap, and, when applied, will not encumber the fuse cap to any appreciable extent. The sleeve or band will also protect the fuse while a blast hole is being loaded or packed, and while the powder is being tamped, it being noted that should the fuse cap be forced against a rock, or other hard substance, there will be no tendency to release the protector, or to injure it in any manner. The present device does not require any preliminary crimping of the fuse cap, and otherwise eliminates any encumbering or expensive elements.

What is claimed is 1. In combination, a blast fuse, a fuse cap inserted over the end thereof, and a soft metallic band slipped over the mouth of the fuse cap and compressed to compress the mouth of the cap and the adjoining portions of the fuse.

2. In combination, a blasting fuse, a fuse cap inserted over the end thereof, and a soft metallic sleeve inserted over the cap with its intermediate portion disposed over the mouth of the cap, and the sleeve being compressed over the mouth of the fuse cap and over the adjoining portions of the fuse, to compress the mouth of the cap and the said portions of the fuse.

In testimony that I claim the foregoing as my own, I have hereto afiixed my signature in the presence of two witnesses.

C. S. WALKER, MILES MoKINNoN.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

